Bonding-pin.



ITE

LEVI S. BACON, OF WASHINGTON, DISTRICT OF COLUMBIA, ASSIGNOR TO DAVID S.WEGG, OF CHICAGO, ILLINOIS.

BONDING-PIN.

SPECIFICATION formingpart of Letters Patent No. 671,009, dated April 2,1901.

A li ti fil d November 19, 1900. Serial No. 36,949. (No model.)

To all, whom, it may concern:

Be it known that I, LEVI S. BACON, a citizen of the United States,residing at Washington, in the District of Columbia, have inventedcertain new and useful Improvements in Bonding-Pins; and I do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

This invention relates to an improvement in bonding-pins for electricrailways, and is embodied in the construction and arrangement of partspresently to be described, and defined in the claim.

I-Ieretofore it has been suggested to construct a bonding-pin offrusto-conical formation and to form in the side thereof a channel forthe wire, the channel being of varying depths. It has also beensuggested to form a pin with parallel sides or cylindrical incrosssection and havinga channel therein of uniform depth and formingthe extreme end of the pin somewhat tapered, the channel at that pointbeing of varying depths. Both constructions have been foundobjectionable in some respects and so largely because an unequalpressure is brought to bear on the wire owing to the varying depths ofthe channel, which'in many cases would tend to break or indent the wirewhen the pin is driven into the rail opening, thus materially affectingthe durability and permanency of the connection. I have found that thisobjection'can be largely overcome by utilizing the principle of theformer constructions as to the uniform taper throughout and applying thechannel form of the latter-namely, a cylinder with a channel of uniformdepth throughout; and with that intention my invention may be stated asconsisting in a bonding-pin tapered throughout and having areceiving-channel for the wire of uniform depth throughout.

In the drawings, Figure 1 represents a pin in side elevation,showing thebase of the channel in dotted lines. Fig. 2 is a longitudinal section.Fig. 3 is an end view. Fig. 4 is a view of a modified form.

A designates the pin proper, which is tapered throughout and has formedin one side thereof the open wire-receiving channel B, which is ofuniform depth throughout. The pin A may be conical in formation or haveone side, as at a, Fig. 4, straight as distinguished fromtapering. Inboth cases, however, there is a wedging portion or surface and thechannel is made of uniform depth, so that the wire will be firmly heldthroughout and a uniform portion thereof permitted to project beyond theplane of the edge of the pin.

The above construction is regarded ofimportance, overcoming, as it doeslargely, the objection to the skiving or cutting of the wire in the actof inserting the pin in the railopening.

Other important advantages are also gained, among which may be statedthat of simplicity of structure and ease of manufacture.

Having thus described the invention, what I claim as new, and desire tosecure by Letters Patent, is-

A bonding-pin tapered throughout and havin g an open-sided longitudinalchannel therein extending from end to end and of uniform depththroughout, substantially as described.

In testimony whereof I aflix my signature in presence of two-witnesses.

LEVI S. BACON. Witnesses:

JosErH H. MILANS, K. E. MONTAGUE.

